arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2406.04874stat.ME
收藏

近似贝叶斯计算与深度学习和保形预测

Approximate Bayesian Computation with Deep Learning and Conformal prediction

Meili Baragatti, Casenave Céline, Bertrand Cloez, David Métivier, Isabelle Sanchez

AI总结:

本文提出ABCD-Conformal方法,首次实现无需汇总统计量、距离和容差阈值的近似贝叶斯计算,结合神经网络与保形预测提供后验均值估计及置信区间,并在四个应用中验证其高效性。

摘要:

近似贝叶斯计算(ABC)方法通常用于在似然函数未知或计算上难以处理的情况下近似后验分布。经典ABC方法基于最近邻类型算法,并依赖于所谓的汇总统计量、数据集之间的距离以及容差阈值的选择。近年来,人们提出了将ABC与更复杂的机器学习算法相结合的方法,以减轻这些“用户选择”的影响。在本文中,我们提出了据我们所知第一个完全无需汇总统计量、距离和容差阈值的ABC方法。此外,与ABC方法的通常推广不同,该方法将置信区间(具有适当的频率学派边际覆盖率)与后验均值估计(或其他矩类型估计)相关联。我们的方法名为ABCD-Conformal,使用带有蒙特卡洛丢弃法的神经网络来提供后验均值(或其他矩类型泛函)的估计,并利用保形理论获得相关的置信集。该方法在估计多维参数时高效且具有摊销性,我们在四个不同的应用上测试了这种新方法,并与文献中的其他ABC方法进行了比较。

英文摘要:

Approximate Bayesian Computation (ABC) methods are commonly used to approximate posterior distributions in models with unknown or computationally intractable likelihoods. Classical ABC methods are based on nearest neighbor type algorithms and rely on the choice of so-called summary statistics, distances between datasets and a tolerance threshold. Recently, methods combining ABC with more complex machine learning algorithms have been proposed to mitigate the impact of these ``user-choices''. In this paper, we propose the first, to our knowledge, ABC method completely free of summary statistics, distance, and tolerance threshold. Moreover, in contrast with usual generalizations of the ABC method, it associates a confidence interval (having a proper frequentist marginal coverage) with the posterior mean estimation (or other moment-type estimates). Our method, named ABCD-Conformal, uses a neural network with Monte Carlo Dropout to provide an estimation of the posterior mean (or other moment type functionals), and conformal theory to obtain associated confidence sets. Efficient for estimating multidimensional parameters and amortized, we test this new method on four different applications and compare it with other ABC methods in the literature.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑